Ultra high performance light sources based on organic field activated devices (FADs)

基于有机场激活器件 (FAD) 的超高性能光源

• 批准号: 1610641
• 负责人: David Carroll
• 金额: $ 40万
• 依托单位: Wake Forest University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2019-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1610641&HistoricalAwards=false
• 关键词: Ultra; performance; light; sources; based

Abstract title: Development of Ultra-High Efficiency Lighting Using AC-driven Organic Devices Abstract:Non-technical: If the efficiency of lighting in US homes and offices could be increased by 50%, it would save $115 Billion nationally by 2025, alleviate the need for 133 new power stations, eliminate 258 million metric tons of carbon and save 273TWh/year in energy. And this is just for room lighting! But, if that increase was larger: 100% or 200%, the impact to the world economy, with all of its applications, could be staggering! How could this be done? In this program an exciting new approach to using organic materials in making light is examined-one that can be far more efficient than the methods used today. The approach uses a newly introduced, nanoengineered, organic thin film lamp architecture and drives the lamp with a resonant AC-electric field which not only stimulates light emission, but introduces internal magnetic fields that allow control over internal quantum efficiencies. So, losses typically associated with the direct flow of current into and out of the structure are managed through reactive power coupling and the proper choice of materials that insulate the emitter of the lamp from the electrical contacts, and internal losses are managed by the magnetic field. Preliminary results from these devices are intriguing, suggesting extraordinary efficiencies combined with high brightness. But exactly how far the efficiency and performance of the principle can be pushed is still unknown. This program will set the foundations of that understanding and potentially drive a revolution in ultra-high performance lighting that is cheap, efficient, and long lived, challenging even the inorganic light emitting diode (LED) for supremacy in the marketplace. Technical: The proposed research will establish a framework for understanding the fundamental mechanisms of light emission in the AC-coupled, organic, field-induced electroluminescent devices. The focus of the work will be an examination of the basic physics of AC field-induced exciton formation required to push forward performance. Specifically, exciton creation rates will be tied to the properties of internal "charge generators"such as nanoparticles (ie. single walled carbon nanotubes, nanoplatelettes, and quantum dots) or small molecules placed proximate to the emitters. Triplet harvesting will be demonstrated in field-induced light generation. This will be tied to modifications of resonant energy transfer efficiency through nanoantennae effects mediated through nanoparticle additives. Finally, a direct correlation between internal magnetic fields and the modification of de-excitation routes that alter single to triplet population dynamics will be shown. The outcome of this work will establish the principles necessary to balance dopants, magnetic interactions and internal energy transfer rates in these types of devices generally, pushing the very limits of their power efficiency and brightness. However, the program also has the potential to set new directions in high performance magneto-optic devices based in organics, based on control over excitation lifetimes using internal magnet fields. This would open opportunities in optical switching, displays, organic lasers, and a host of other such applications.

摘要标题：使用交流驱动有机器件开发超高效率照明 摘要：非技术性：如果美国家庭和办公室的照明效率能够提高 50%，到 2025 年将在全国节省 1150 亿美元，减少对 133 个新发电站的需求，消除 2.58 亿吨碳排放，每年节省 273TWh 能源。 这仅用于房间照明！但是，如果增幅更大：100% 或 200%，对世界经济及其所有应用的影响可能是惊人的！ 这怎么可能做到呢？ 在这个项目中，研究了一种令人兴奋的使用有机材料来发光的新方法，该方法比当今使用的方法要高效得多。该方法采用新推出的纳米工程有机薄膜灯架构，并通过谐振交流电场驱动灯，该电场不仅刺激光发射，而且引入内部磁场，从而可以控制内部量子效率。 因此，通常与电流直接流入和流出结构相关的损耗可以通过无功功率耦合和正确选择将灯的发射器与电触点绝缘的材料来管理，而内部损耗则可以通过磁场来管理。 这些设备的初步结果很有趣，表明其具有非凡的效率和高亮度。 但该原理的效率和性能到底能提升到什么程度仍是未知数。 该计划将为这种理解奠定基础，并有可能推动超高性能照明领域的一场革命，这种照明廉价、高效、寿命长，甚至挑战无机发光二极管 (LED) 的市场霸主地位。 技术：拟议的研究将建立一个框架，用于理解交流耦合有机场致电致发光器件中光发射的基本机制。这项工作的重点将是检查推动性能所需的交流场诱导激子形成的基本物理原理。 具体而言，激子产生速率将与内部“电荷发生器”的性质相关，例如纳米粒子(即单壁碳纳米管、纳米板和量子点)或靠近发射器放置的小分子。 三重态收获将在场诱导光产生中得到演示。 这将与通过纳米颗粒添加剂介导的纳米天线效应来改变谐振能量转移效率有关。最后，将显示内部磁场与改变单线态到三线态粒子群动态的去激励路径的修改之间的直接相关性。 这项工作的成果将建立平衡此类设备中的掺杂剂、磁相互作用和内部能量传输率所需的原则，从而突破其功率效率和亮度的极限。然而，该项目还有可能基于使用内部磁场控制激发寿命，为基于有机物的高性能磁光器件设定新方向。 这将为光开关、显示器、有机激光器和许多其他此类应用带来机遇。